What perfumes are similar to Impromptu?

Fragrances with the closest accord profile to Impromptu by Avon: Opium (1977) by Yves Saint Laurent; Obsession by Calvin Klein; Toujours Moi by Dana. Each is selected by cosine similarity on accord strengths and shared notes.

Why are these perfumes considered similar?

Similarity is computed from three signals: (1) cosine similarity between accord strength vectors, (2) Jaccard overlap on note sets across the pyramid, (3) a curated "often compared to" list from community mentions. The top matches blend all three.